Oluaibia planograph co



H. A. DOUGLAS.

CIRCUIT CONNECTOR. APPLICATION FILED IIAYZZ. 19H]- Patented July 1, 1919.

'IIIIIIIIIIIIIIIIIIIIIII \I'll co WASIHNGTON D g UNITED STATES PATENT OFFICE.

HARRY A DOUGLAS, OF BRONSON, MICHIGAN, ASSIGNOR TO DOUGLAS & RUDD MFG. (30., OF BRONSON, MICHIGAN, A CORPORATION OF MICHIGAN.

@ 1 CIRCUIT-CONNECTOR.

Original application filed October 24, 1917, Serial No. 198,339.

Specification of Letters Patent.

1918. Serial No. 236,083.

To all Wi d/(NH it may concern:

lie it known that I. HARRY A. DoUcLas, citizen of the United States, residing at, Bronson, in the county of Branch and State of Michigan, have invented a certain new and useful Improvement in Circuit-Connectors. of which the following is a full, clear, concise, and exact description.

My invention relates to tubular shells and is of pfll'tlClllttl' service where such shells are employed in the construction of circuit continuing or connecting devices in which contact carrier cores are used, though the invention is not to be limited to this use.

It is the object of my invention to provide an improved form of arm or lug projecting from the shell and a novel assembly of this arm with the shell. In carrying out my invention I provide an outer bulging portion along and within which an arm extends. This bulging portion of the shell permits a contact carrying core that conforms in cross section to the bore of the shell to be placed within the shell in the same zone with the arm that is received in the bulging portion of the shell, while allowing such arm to be confined between the contact carryin core and the metal of the shell. The shell also desirably carries a lug spaced apart from the aforesaid bulging portion of the shell and which cooperates with the bulging portion of the shell, and preferably also the contact carrying core, to hold the arm and shell in assembly without the aid of a fastening screw.

I will explain my invention more fully by reference to the accompanying drawing in which Figure 1 is a longitudinal sectional view of a shell; Fig. 2 is a longitudinal sectional view of the shell in assembly with the contact carrying core; .Fig. 3 is a longitudina l sectional view of the shell shown in Fig. 2 on line of Fig. 2; Fig. 4 is a cross section on line 44 of Fig. 3; and Fig. 5 is a side elevation.

Like parts are indicated by similar characters of reference throughout the different figures.

The shell 1 has bayonet slots 3, 4, each of the bayonet slots 4 being partially formed in the two opposite parallel and abutting edge portions of the sheet out of which the shell is formed as indicated at 4 the per tions 4 matching, when the sheet is curled,

to term the bayonet slots 4. In these same opposite edges mortises 5 and tenons 6 are formed, the mortises and tenons interengaging to maintain the shell in shape,

The contact carrier 8 constitutes a core and carries contacts 9 adapted for engagement with contacts upon circuit continuing devices that are receivable in the ends of the shell and are adapted to be coupled therewith with the aid of the bayonet slots 3 and l, as is well understood by thdse familiar with the art. This contact carrying core, generally of insulating material, is preferably driren tightly into the shell further to e'liect and maintain tight engagement between the inortises and tenons 5 and 6. Such core, however, may otherwise be assembled with the shell, if desired.

The core, is cylindrical to correspond to the cylindrical bore of the shell. An intermediate portion of the core is outwardly bulged as indicated at 10 to afford suliicient space between the core and the bulging part 10 of the shell for the reception of an arm 11 that has a continuation 12 extending th ough the shell. This continuation 12 is preferably angular to the arm 11 to form therewith an ngular lug oi which the part 12 is also an arm. The arm 12 of the lug is shown as equipped with a screw hole 13 whereby the shell may be mounted. The arm 12 of the angular la is wider at the arm 11 so as to engage the sides of the lateral opening l-l in the shell that intervenes between the bulging portion 10 and an outwardly projecting lug 15 formed by a part of the metal that is displaced in making the opening 14. The arms 11 and 12 both extend through the openin 14 that is at the bulgin portion 10 to the exterior of the shell, t 0 arm 12 extending sutliciently beyond the shell to form an attaching means.

In assembling the parts the arm 11 of the angular lug is inserted through the opening 14, the angular lug then being turned until the arm 12 of the angular lu rests against the lug 15 and is at right angFes to the shell. The contact carrying core is thereafter placed in the shell to be in the zone that includes the arm 11 of the angular lug, the core serving to hold the arm 11 of the anular lug in position against the inner surab-c of the bul 'ng portion 10 whereby the angular lug an the shell are maintained in aseombly. An hitherto stated the more may be driven into position so as to be held in fixed relation with the shell or may be otherwise so held.

\Vhilo l prolor to rely upon the core to hold the arm 1] olthe angular ling against the bulging portion if) oi the sin-IL I do not Winh iobo'limited to this illtil'tH'l'UllSlll'.

The present applimtion is a (llVlPblU-ll of my original app ioation Serial No. ltlfidlilih filed ()i'tobor 2+ 191T, l'eaturon of novelty not horn-in rlziin'ied being claimed in the earlier applita -tion.

lVhile I have herein shown and particularly described the preferred einbodimentof my invention 1 ,do not wish to be limitod to the precise details of roi'istruotion shown as changes may readily be made Without ileparting from the spirit of my invention, but having thus described my invention 1 claim an new and desire to secure by Letters latonl the following 1. A shell having an outwardly bulging portion, a lateral obening at the bulging por tion, and aprojecting lug near said bulging portion; in combination with an angular lug having one arm rereivedin Said bulging portion and iteinther arm projecting through said opening and engaging the first a foresaiddug; and a core within the shell in the zone ofi-the firstnforesaid. arm and engaging itto maintain the angular lug and she'llin assembly.

2. A shell having an ontiwardly bulging portioinn lateral opening at theibulging portion, and a projecting lug near said bulging portion; in oonibination with an arm re ceived in said bulging portion and projecting:

through said opening and engaging said lug; and a core within the shell in the zone of said arm to maintain the arm and shell in assembly.

3. A shell having an outwardly bulging, portion and a lateral opening; in (f()llll)lllittion with an angular lug; having one arm re (rived in said bulging portion and its other arm projoutin r through said opnning; and a corn within the shell in the zone of the first aforesaid arm and engaging it to maintain the angular lug ,and shell in assembly.

at. A .shell having an outwardly bulging portion and a lateral opening; in combination with an arm rweived in said bulging portion and projecting through said-mien ing: and a core within the shell in the zone of said arm and ei'igaging the Salli-0 to main tain it and shell in assembly.

5. A shell having an outwardly bulging portion. a lateral opening at the bulging portion, and a projecting lug near said bulging portion; in combination with an angular lugihavingr one arm rervived in said bulging portion and its other arm projecting thron g'h Milli opening and engaging the first aforeiinid lug.

i0. A shell having an outwardly bulging portion, a lateral opening at the bulging portion, and ia projecting lug near said bulging portion; in combination with an arm received in said bulging portion and projeoting through eaid opening and en aging said lug.

lnwitnese whereof, I hereunto subscribe my name this 8th day of May. A. D. 1-918.

HARRY A. DUUGLA qppleslot this went may be obtained tor five cents each, by addressing the Commissioner of Ia tentsi Washington, D. C. 

